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FCD-IPM Installation and Operation Manual 

Appendix A  Interface Specifications and Cable Diagrams 

 

Control Cable Connector 

A-5 

The following section provides information on the main and sub link connectors. 
The connectors are provided as follows: 
•  The unbalanced interface of the E1 and SUB E1 links are terminated in two 

BNC connectors. The connectors are designated RX-IN and TX-OUT. 

•  The balanced interface of the E1, SUB E1, T1 and SUB T1 are terminated in an 

eight-pin RJ-45 connector, wired in accordance with 

1 

RD(T) 

Input 

Receive data (tip) 

2 

RD(R) 

Input 

Receive data (ring) 

3 FG 

↔ 

Frame ground 

4 

TD(T) 

Output 

Transmit data (tip) 

5 

TD(R) 

Output 

Transmit data (ring) 

6 FG 

 

↔ 

Frame ground 

7,8  

 

Not 

connected 

 

 

 

The following section provides information on the 2-wire SHDSL main link 
connectors. 

 illustrates location of the pins in the E1 over SHDSL 

connector. 

4 5